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    <title>Document</title>
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    <script>
      function Star(uname, age, song) {
        this.uname = uname
        this.age = age
        this.song = song
      }
      const zl = new Star('赵雷', '36', '鼓楼')
      console.log(zl)
      console.log(zl.__proto__.constructor === Star)
      console.log(zl.__proto__.__proto__ === Object.prototype)
      console.log(zl.__proto__ === Star.prototype)
      console.log(zl.__proto__.__proto__.constructor === Object)
      console.log(zl.__proto__.__proto__.__proto__)
    </script>
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